feat(authorization-obligations): name handlers registered by call or convention

Task 2.6. The entry-point mapper named a handler only from a decorator on the
function, so projects that register routes elsewhere had no named entry point
and every obligation on them was unreachable. It now also names Python handlers
registered through add_url_rule and add_resource, the HTTP-verb methods of a
Resource, MethodView, APIView or ViewSet subclass, the handler identifier on a
JavaScript router registration with its middleware as access evidence, and the
exported HTTP-verb functions of a Next.js route module.

Access classification, evidence, conditions and the record shape are unchanged,
and the map gate output is byte-identical.

Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01T7XD7x5KonMdmGRkp63EQG

src/openultrasast/mapping.py

@@ -2,6 +2,8 @@ from __future__ import annotations
 
 import ast
 import json
+import re
+from collections.abc import Mapping, Sequence
 from dataclasses import asdict, dataclass, replace
 from pathlib import Path
 from typing import Any, Literal, cast
@@ -194,6 +196,7 @@ def _python_entry_points(target: FileTarget, text: str) -> list[EntryPointRecord
     except SyntaxError:
         tree = None
     if tree is not None:
+        records.extend(_python_registered_routes(target, tree))
         for node in ast.walk(tree):
             if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef)):
                 decorators = [_safe_unparse(decorator) for decorator in node.decorator_list]
@@ -244,20 +247,25 @@ def _python_entry_points(target: FileTarget, text: str) -> list[EntryPointRecord
 def _js_entry_points(target: FileTarget, text: str) -> list[EntryPointRecord]:
     records: list[EntryPointRecord] = []
     route_tokens = (".get(", ".post(", ".put(", ".delete(", ".patch(", ".use(")
-    for number, line in enumerate(text.splitlines(), start=1):
+    lines = text.splitlines()
+    bounds = _js_function_bounds(lines)
+    for number, line in enumerate(lines, start=1):
         stripped = line.strip()
         if any(token in stripped for token in route_tokens) and any(prefix in stripped for prefix in ("app", "router", "server")):
+            handler, middleware = _js_registration(stripped, bounds)
+            access, evidence = _js_route_access(middleware, stripped)
+            start, end = bounds.get(handler or "", (number, number))
             records.append(
                 _entry(
                     target,
-                    number,
-                    number,
-                    _js_handler_name(stripped),
+                    start,
+                    end,
+                    handler or _js_handler_name(stripped),
                     "http_handler",
                     "route",
-                    "public",
+                    access,
                     "http_request",
-                    [stripped],
+                    evidence,
                     _line_conditions(stripped),
                 )
             )
@@ -276,9 +284,93 @@ def _js_entry_points(target: FileTarget, text: str) -> list[EntryPointRecord]:
                     _line_conditions(stripped),
                 )
             )
+    records.extend(_js_route_module(target, lines, bounds))
     return records
 
 
+_RESOURCE_BASES = ("resource", "methodview", "apiview", "viewset", "modelviewset", "httpendpoint")
+_HTTP_VERBS = ("get", "post", "put", "patch", "delete", "head", "options")
+
+
+def _python_registered_routes(target: FileTarget, tree: ast.AST) -> list[EntryPointRecord]:
+    """Handlers whose route is registered by a call or by convention, not by a decorator on the function itself
+    (authorization-obligations 2.6): `add_url_rule(path, view_func=fn)`, `api.add_resource(Cls, path)`, and the HTTP-verb
+    methods of a `Resource`/`MethodView`/`APIView`/`ViewSet` subclass. Without these, projects that register their routes
+    elsewhere have no named entry point and every obligation on them is unreachable."""
+    functions: dict[str, ast.FunctionDef | ast.AsyncFunctionDef] = {}
+    classes: dict[str, ast.ClassDef] = {}
+    for node in ast.walk(tree):
+        if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef)):
+            functions.setdefault(node.name, node)
+        elif isinstance(node, ast.ClassDef):
+            classes.setdefault(node.name, node)
+    registered_functions: set[str] = set()
+    registered_classes: set[str] = set()
+    for node in ast.walk(tree):
+        if not isinstance(node, ast.Call):
+            continue
+        callee = _safe_unparse(node.func)
+        trailing = callee.rsplit(".", 1)[-1]
+        if trailing == "add_url_rule":
+            for keyword in node.keywords:
+                if keyword.arg == "view_func":
+                    registered_functions.add(_safe_unparse(keyword.value).split(".")[0])
+            registered_functions.update(_safe_unparse(arg) for arg in node.args[1:2] if isinstance(arg, ast.Name))
+        elif trailing in {"add_resource", "register_blueprint", "include_router"} or trailing == "add_view":
+            registered_classes.update(_safe_unparse(arg) for arg in node.args if isinstance(arg, ast.Name))
+            registered_functions.update(_safe_unparse(arg) for arg in node.args if isinstance(arg, ast.Name))
+    records: list[EntryPointRecord] = []
+    for name in sorted(registered_functions):
+        handler = functions.get(name)
+        if handler is None or _has_route_decorator(handler):
+            continue
+        decorators = [_safe_unparse(decorator) for decorator in handler.decorator_list]
+        access, evidence = _python_route_access(decorators)
+        records.append(
+            _entry(
+                target,
+                handler.lineno,
+                getattr(handler, "end_lineno", handler.lineno),
+                handler.name,
+                handler.name,
+                "route",
+                access,
+                "http_request",
+                evidence or [f"registered handler {handler.name}"],
+                _python_conditions(handler, decorators),
+            )
+        )
+    for name, klass in sorted(classes.items()):
+        bases = [_safe_unparse(base).rsplit(".", 1)[-1].lower() for base in klass.bases]
+        if name not in registered_classes and not any(base in _RESOURCE_BASES for base in bases):
+            continue
+        class_decorators = [_safe_unparse(decorator) for decorator in klass.decorator_list]
+        for child in klass.body:
+            if not isinstance(child, (ast.FunctionDef, ast.AsyncFunctionDef)) or child.name.lower() not in _HTTP_VERBS:
+                continue
+            decorators = class_decorators + [_safe_unparse(decorator) for decorator in child.decorator_list]
+            access, evidence = _python_route_access(decorators)
+            records.append(
+                _entry(
+                    target,
+                    child.lineno,
+                    getattr(child, "end_lineno", child.lineno),
+                    child.name,
+                    f"{name}.{child.name}",
+                    "route",
+                    access,
+                    "http_request",
+                    evidence or [f"{name} handler method {child.name}"],
+                    _python_conditions(child, decorators),
+                )
+            )
+    return records
+
+
+def _has_route_decorator(node: ast.FunctionDef | ast.AsyncFunctionDef) -> bool:
+    return any(_looks_like_route_decorator(_safe_unparse(decorator)) for decorator in node.decorator_list)
+
+
 def _c_entry_points(target: FileTarget, text: str) -> list[EntryPointRecord]:
     records: list[EntryPointRecord] = []
     for number, line in enumerate(text.splitlines(), start=1):
@@ -476,6 +568,71 @@ def _looks_conditional(text: str) -> bool:
     )
 
 
+_JS_FUNCTION = re.compile(r"^\s*(?:export\s+)?(?:default\s+)?(?:async\s+)?function\s+([A-Za-z_$][\w$]*)")
+_JS_EXPORTED_VERB = re.compile(r"^\s*export\s+(?:async\s+)?(?:function\s+([A-Z]+)|const\s+([A-Z]+)\s*=)")
+_JS_IDENTIFIER = re.compile(r"^[A-Za-z_$][\w$.]*$")
+_JS_AUTH_TOKENS = ("auth", "login", "session", "jwt", "token", "protect", "guard", "require")
+_JS_ROLE_TOKENS = ("role", "permission", "admin", "owner")
+
+
+def _js_function_bounds(lines: Sequence[str]) -> dict[str, tuple[int, int]]:
+    """Declared function names to their 1-based line span, by brace balance from the declaration."""
+    bounds: dict[str, tuple[int, int]] = {}
+    for index, line in enumerate(lines):
+        match = _JS_FUNCTION.match(line)
+        if match is None:
+            continue
+        depth = 0
+        end = index
+        for cursor in range(index, len(lines)):
+            depth += lines[cursor].count("{") - lines[cursor].count("}")
+            end = cursor
+            if depth <= 0 and "{" in "".join(lines[index : cursor + 1]):
+                break
+        bounds.setdefault(match.group(1), (index + 1, end + 1))
+    return bounds
+
+
+def _js_registration(line: str, bounds: Mapping[str, tuple[int, int]]) -> tuple[str | None, list[str]]:
+    """`router.get('/books', requireAuth, listBooks)` -> the handler identifier and the middleware identifiers before it."""
+    body = line[line.find("(") + 1 : line.rfind(")")] if "(" in line and line.rfind(")") > line.find("(") else ""
+    parts = [part.strip() for part in body.split(",") if part.strip()]
+    identifiers = [part for part in parts[1:] if _JS_IDENTIFIER.match(part)]
+    if not identifiers:
+        return None, [line]
+    handler = next((name for name in reversed(identifiers) if name in bounds), identifiers[-1])
+    middleware = [name for name in identifiers if name != handler]
+    return handler, middleware
+
+
+def _js_route_access(middleware: Sequence[str], line: str) -> tuple[AccessLevel, list[str]]:
+    lowered = " ".join(middleware).lower()
+    evidence = [f"middleware {name}" for name in middleware] or [line]
+    if any(token in lowered for token in _JS_ROLE_TOKENS):
+        return "role-restricted", evidence
+    if any(token in lowered for token in _JS_AUTH_TOKENS):
+        return "authenticated", evidence
+    return "public", evidence
+
+
+def _js_route_module(target: FileTarget, lines: Sequence[str], bounds: Mapping[str, tuple[int, int]]) -> list[EntryPointRecord]:
+    """Next.js App Router convention: exported HTTP-verb functions in a `route.<ext>` module are the handlers."""
+    if Path(target.path).stem != "route":
+        return []
+    verbs = {verb.upper() for verb in _HTTP_VERBS}
+    records: list[EntryPointRecord] = []
+    for index, line in enumerate(lines, start=1):
+        match = _JS_EXPORTED_VERB.match(line)
+        name = (match.group(1) or match.group(2)) if match else None
+        if name is None or name not in verbs:
+            continue
+        start, end = bounds.get(name, (index, index))
+        records.append(
+            _entry(target, start, end, name, f"route.{name}", "route", "public", "http_request", [f"route module export {name}"], [])
+        )
+    return records
+
+
 def _js_handler_name(line: str) -> str | None:
     if "function " in line:
         return line.split("function ", 1)[1].split("(", 1)[0].strip() or None